Tool or cutter holder for grinding-machines.



.No. 665,303. Patented Jan. |9m.

I J. BATH.

TOOL 0B CUTTER HOLDER FDR GBINDING MACHINES. (A umiim filed July 28,1900.)

(No Model.) 3- Sheets-Sheet \A/I'T'NEEEEE: I Z37 I I Patented Ian. I,190i.

' J. BATH. TOOL 0R CUTTER HOLDER-FOB GRINDING MACHINES.

3 Sheets-Sheet 2.

(N0 Model.)

Lu N mm E .6QM 5 No. 665,303. Patented Ian. IBM.

J. BATH. TOOL 0R CUTTER HOLDER FOB GRINDING MACHINES. (Application filedJuly 28, 1900.)

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' AA I N55555:

UNITED STATES PATENT QFFICE.

JOHN BATH, OF WORCESTER, MASSACHUSETTS.

TOOL OR CUTTER HOLDER FOR GRINDING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 665,303, dated January1, 1901.

Application filed July 28, 1900. Serial No. 25,131. \No model.)

To all whom it may concern.-

Be it known that 1, JOHN BATH, a citizen of the United States, residingin Worcester, in the county of Worcester and State of Massachusetts,have invented new and useful Improvements in Tool or Cutter Holders forGrinding-Machines, of which the following is a specification. 4

This invention relates to that class of attachments forgrinding-machines adapted for holding the tools or cutters andpresenting their cutting edges to the grinding-wheel; and the inventionconsists of certain novel constructions and arrangements of parts,whereby the tools or cutters may be held in a great variety of positionsby reason of the variety and number of adjustments of which the holderis capable.

The nature of the invention is fully described in detail below andillustrated in the accompanying drawings, in which- Figure 1 is a rearelevation of my improved attachment or holder with a cutter or tool inposition to be ground. Fig. 2 is a longitudinal vertical section of thesame looking toward the rear-that is, toward the side from which thecutting edge of the tool extends. Fig. 3 is a plan view'showing theparts so adjusted as to present a tool to the emery-wheel at aparticular angle for grinding off the corner of one of the cutters. Fig.at is a perspective view of a block adapted to be laid in the trough.

Similar letters of reference indicate corresponding parts.

a represents the square or rectangular base of the holder, said basebeing provided with one or more slots at, whereby it is secured to asuitably slotted or grooved bed 1), making a part of thegrinding-machine, a sufficient portion of said bed being shown toillustrate the connection of the holder with the machine. Therectangular shape of the base allows it to be adjusted in position withrelation to the bed by means of a try-square or other instrument adaptedto determine whether the side of the base is parallel with the side ofthe bed or at what angle it is with relation thereto. The base a is heldin position by a clamping-screw (1, whose head (1 lies in the groove 1)and which extends up through the slot a and is engaged by the nut e,provided with a suitable handle e.

Integral with the base a. is a standard A, horizontally bored at A toreceive the horizontal holder B, whose portion B has its bearings insaid bore, thus allowing the rotation of the holder on a vertical plane.This swiveled holder B is held in any desired position in the standardby the screw 0, provided with the large and broad head or handle 0,adapted to be screwed against a suitable washer O. The horizontal holderB is vertically or rectangular-1y bored at B to receive the round stemE, supporting and integral with the trough E, in which the shanks, as F,of the tools or cutters, as F, lie when said cutters are being ground.This stem, and hence of course the trough E, is adjustable bothrotatively and as to height and is held in any desired position by thescrew f, which sets against the washer f, as illustrated in Fig. 2. Bymeans of these two swivel-joints and the vertical and horizontaladjustments above described any desired angle, whether vertical,horizontal, or a combination of the two, may be obtained, so thatsurfaces may be presented to the emery-wheel S, which it has not, so farasI am aware, been found practicable to grind up to the present time. Itis impossible of course to illustrate the different positions attainableby this contrivance or the m any tools which can be ground by its means.The position shown in Fig. 3 is, however, one in which the toolillustrated can be ground at points which have heretofore been foundvery difficult, if not impossible, to operate upon. The length of thestem E, the closeness of the axial line of the trough to the tool beingground, and the length of the holder B all serve to enable the machineto apply a short or long radius or bevel, as desired. The fact that theswiveling-point of the trough E is at so great a distance from the pointat which the bed a is connected with the' machine, in connection withthe fact that the trough is raised to such a height from said bed,enables the operator to cut an exceedingly small bevel without danger ofthe holder in its movements for adj ustment coming in contact with anypart of the machine. It is evident that the swivel-stem can make acomplete circle, and hence the variety and number of angles andadjustments are almost unlimited.

H is a collar held adj ust-ably on the stem E by a suitableclamping-handle H, said collar being provided with an integral verticalsocket or gage-holder H, in which a vertical gage-rod his adjustablysecured. This gage-rod extends up against the tool or instrument to beground and prevents rotative movement.

One side of the trough E is provided with an integral wing E, which ishorizontally tapped to receive the threaded portion of a screw I, whichconstitutes a horizontal hearing for a swiveled block J, provided withtwo horizontal holes J. By means of a pivot J in one of these holes theshank portion K of a jaw K is pivotally connected with the block, so asto swing therefrom in a vertical plane. By means of a suitable handle Kthis jaw is swung upon and off the tool or cutter to be ground, whileits free edge is 'held down upon the work by an engaging ring or dog L,which is free to slide on the plain portion of the vertical screw P,which extends down through the slot 7c in the jaw K and screws into theblock J. The lower front edge of this dog L is provided with teeth L,which are adapted to engage with corresponding teeth It on oppositesides of the slot in the jaw K. The screw P is provided with a nut L",the rotation of which jams the ring or dogL down into engagement withthe jaw K. The jaw may be pivoted to the block J by means of either ofthe holes J, according to the range of movement desired and the tool tobe operated upon. On the opposite sides of the block J are bosses R,into either one of which may be screwed the gage-rod T, such gage-rodextending at right angles from the side of the block and being exactlyparallel with the gripping edge of the jaw K. On this gage-rod is asliding clamp U, which by means of a shank U supports a head or holderU", which is bored to receive the stem 7 of the V-shaped gage V. Thisstem is held adjustablyin position by a screw v. The end of the shank ofthe tool rests in the V-shaped gage, as shown in Fig. 3, and as the toolis turned to present a different face to the cutter the gageaccommodates itself thereto. Hence the gage-rod is always parallel withthe front edge of the aw.

By means of the pivot I the jaw will conform itself to the general lineof the work to be ground and can then be pressed upon said work by thescrew P and dog L. The work is easily released by loosening the nut L.

The parts A and B may be provided with suitable scales at V and V,respectively, in

order to determine the relative rotation of the parts 13 and E.

In Fig. 4, W represents a block made V- shaped, so as to lie in thebottom of the trough E, said block being provided with the hole W. Whenthe tool to be operated upon has a very short shank, such a block islaid in the trough and screwed into position by means of a screw in thehole Y, Fig. 2, and the shank of the tool is set against it.

Having thus fully described myinvention, what I claim, and desire tosecure by Letters Patent, is

1. In a tool and cutter holder for grindingmachines, the slotted base(L, a; the upright A extending vertically and rigidly from said base andhorizontally bored at A; the horizontal holder 13 formed with theportion B having its bearings in the bore in said upright and therebyrevolving in a vertical plane, said holder being provided with thevertical or transverse bore B; the trough E provided with the stem Eextending at right angles therewith and into the bore B; the verticalpivot (1 extending through the slot at; and a horizontally-grooved bedadapted to receive the head of said pivot, whereby the holder is adaptedto be rotated in a vertical plane in the upright, the stem of the troughis adapted to be rotated in a plane which is at right angles with theplane of the rotation of the holder, the upright is adapted to berotated around the adjustable pivot carrying with it the holder, stemand trough, and the base a is adapted to be adjusted horizontallyrotatively and in a straight line without disturbing the adjustment ofthe holder or stem and trough or losing the alinement oi the blockswiveled to the trough, substantially as set forth.

2. In a tool and cutter holder fol-grindingmachines, the upright Aadapted to be pivotally secured to a bed; the horizontal holder 13swiveled to said upright; the trough and stem E, E swiveled in theholder; the block J swiveled to the trough and adapted thereby to berotated in a plane at right angles with the plane of the rotation of thetrough; and the shank K and jaw K pivotally connected with the block andthereby adapted to rotate on a plane which is at right angles with theplane of rotation of the block, substantially as described.

3. In a tool and cutter holder for grindingmachines, a holder rotativelysupported by the frame of the machine; the trough E swiveled to theholder as described; a block pivotally supported by said trough wherebyit is rotated in a plane which is at right angles with the plane ofrotation of the trough; a jaw pivotally supported by the block wherebyit is rotated in a plane which is substantially at right angles with theplane of rotation of the block; the gage-rod T extending from the blockat right angles therewith, and the sliding gage comprising the shank U,head or holder U and gage supported by said head or holder adapted toengage the end of the shank of the tool resting in the trough,substantially as set forth.

4. In a tool and cutter holder for grindingmachines, a trough as Eswiveled to a holder which is rotatively supported by the frame of themachine; a block pivotally supported by said trough; a jaw pivotallysupported by the block and rotating in a plane which is substantially atright angles with the plane of the rotation of the block; a gage-rodextending from the block at substantially right angles thereto; a heador holder supported by the gage-rod; and a gage sWiveled in the head orholder and provided with a substantially V-shaped notch or recess forthe reception of the end of the shank of the tool or cutter,substantially as set forth.

5. In a tool and cutter holder for grindingmachines, in combination withthe rotative trough E and a suitable holder therefor; the

wing E extending horizontally from one side Wall of the trough and atsubstantially right angles therewith; the block J swiveled to said wingand adapted thereby to be rotated in a plane at right angles with theplane of rotation of the trough; and the integral shank K and jaw Kpivotally connected with the block and thereby adapted to rotate on aplane which is substantially at right angles with the plane of therotation of the block, substantially as described.

JOHN BATH. Witnesses:

HENRY W. WILLIAMS. A. N. BONNEY.

